ADA and XRP is the good one, but i personally don't like to invest on Top coins. I always find low market cap,undervalued & underrated coin so i can get a lot of money from that because it will be easy to rise more than 10 times when he had hes momentum.
investing in undervalued coins is indeed quite profitable, especially if you can become early buyers. but you also have to watch out for the potential rugpull, because now quite a lot of rugpull is happening in dex. make sure that the project you invest in has a good team background or at least has a use case that makes sense